If we have a triangle with angles α, β, and γ and sides a, b, and c opposite these angles respectively, then the following relationships hold.
| a | = | b | = | c | |
| sin α | sin β | sin γ |
| a2 = b2 + c2 − 2bc cos α | |
| b2 = a2 + c2 − 2ac cos β | |
| c2 = a2 + b2 − 2ab cos γ |